Hi Jens, this series drops the obsolete bio mode from the null_blk driver and then converts the driver to pass the queue limits to blk_mq_alloc_disk. Diffstat: main.c | 500 +++++++++++++++---------------------------------------------- null_blk.h | 17 -- trace.h | 5 zoned.c | 17 -- 4 files changed, 134 insertions(+), 405 deletions(-)